I would be shocked too. He's not 20 yet.
I don't know all of the rules for service time. Control and arb. But you don't want to lose a year of control for this year.
If he can get a cup of coffee with roster expansion and that does not impact control, then maybe you do that so he's ready to make an impact next year. I'm less worried about super 2 b/c my understanding is that all you are saving is money, not control.